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Doepfer A-138b Vintage Edition

Doepfer A-138b Vintage Edition

Doepfer A-138b Vintage Edition, mixer, potentiometers with logarithmic response, so especially suitable for audio signal mixing, black Front Panel

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10 customer ratings:

Overall rating
4.8 out of 5 stars
handling
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5 Stars
8 Customers

8 customers have given this product a 5-star rating.

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4 Stars
2 Customers

2 customers have given this product a 4-star rating.

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Doepfer A-138-B Mixer

Blair, 18.11.2013

– Assumed from Doepfer A-138b

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The A-138b is essentially a 4 into 1 mixer optimised for audio signals rather than control voltages. the 'b' in the name means the the mixer uses logarithmic rather than linear potentiometers.

For me the A-138b is an essential piece of equipment because it enables me to sum the outputs of up to 4 sound sources (for instance VCO's or noise sources) before sending the combined output to my A-108 Low pass filter module.

With one input employed, and with the channel and master levels set to 10, the volume of the output is the same level as the input signal. in other words, this module will not increase the gain of an input, it will only attenuate it.

When using multiple inputs I find I have to reduce the levels of the individual channels quite a lot, otherwise the output from the mixer becomes to much for next module in the chain. So if I am using 3 inputs, I will use a maximum of about 33% of each channel's volume.

The mixer appears to operate very quietly. It does not introduce much 'hiss' into the sound. Some reviewers have found otherwise , so it may be that my ears are not as sensitive as theirs.

I have rated the A-138b as 5 stars except for features, which I have given a 4 for. The reason for this is that the Doepfer website indicates that with no input into channel 1, the channel 1 level will act as a +5 volt DC offset. In other words, the unit *can* increase the level beyond that of an input signal. However, my unit doesn't work like this. As delivered, all 4 inputs on my A-138b work in the same way. The manual says there is a jumper I need to re-position on the rear of the circuit board to achieve the +5 volt DD offset with input level 1. I think this option should have been made available as a toggle switch on the front panel. It would be useful on occasions when I am only using 3 inputs, but I do not want to have to remove the unit from its case and re-position a jumper each time to achieve this!

Overall, another useful and great value unit from Doepfer, in my opinion.

Mixer for all seasons

LiamJ, 10.02.2015

– Assumed from Doepfer A-138b

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If your modular system is growing and you don't have a mixer, buy one. If you have more than 1 Oscillator in your setup, a white noise module or separate drum modules, you'll want this to to mix your sounds nicely, super simple but super effective and does the job it was set out to do.
Show variations of this product
Doepfer A-138b Vintage Edition
(10)
Doepfer A-138b Vintage Edition

Doepfer A-138b Vintage Edition, mixer, potentiometers with logarithmic response, so especially suitable for audio signal mixing, black Front Panel

  • Module: Yes
  • Empty Rack, Or Housing: No
  • Basic System: No
  • Accessories: No
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(40)
Doepfer A-180-2 Multiples

Passive Multi-Port Distributor 8x Interconnected jacks, Sockets are divided into 2x quadruple groups; but can also be modified to an eight-multiple (soldering bridge on the circuit board), Width:...

  • Module: Yes
  • Empty Rack, Or Housing: No
  • Basic System: No
  • Accessories: No
Doepfer A-110-1
(49)
Doepfer A-110-1

Standard VCO for Modular System A-100Module A-110-1 (VCO) is a voltage controlled oscillator. The A-110-1 produces frequencies in a range of about 8 octaves, of which four waveforms are available...

  • Module: Yes
  • Empty Rack, Or Housing: No
  • Basic System: No
  • Accessories: No
Doepfer A-124 Wasp Filter SE
(12)
Doepfer A-124 Wasp Filter SE

Wasp Filter Special edition, Black front, Yellow knobs

  • Module: Yes
  • Empty Rack, Or Housing: No
  • Basic System: No
  • Accessories: No
Doepfer A-140
(39)
Doepfer A-140

ADSR Envelope Generator The module A-140 is a envelope generator and since it delivers control voltages, belongs to the modulation-modules. As soon as the ADSR is triggered at gate-input, it...

  • Module: Yes
  • Empty Rack, Or Housing: No
  • Basic System: No
  • Accessories: No
Doepfer A-138b
(37)
Doepfer A-138b

Doepfer A-138b - mixer with logarithmic potentiometers.

  • Module: Yes
  • Empty Rack, Or Housing: No
  • Basic System: No
  • Accessories: No
Doepfer A-180-3 Dual Buffered Multiple
(6)
Doepfer A-180-3 Dual Buffered Multiple

Doepfer A-180-3 Dual Buffered Multiples, dual buffered 1-in-3 multiple to copying/buffering of control and audio signals, Width: 4 TE / 4HP / 20.0 mm

  • Module: Yes
  • Empty Rack, Or Housing: No
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Doepfer A-160-2 Clock Divider II
(5)
Doepfer A-160-2 Clock Divider II

Frequency divider For clock/trigger/gate signals, Width: 4 TE/ 4 HP / 20 mm

  • Module: Yes
  • Empty Rack, Or Housing: No
  • Basic System: No
  • Accessories: No
Doepfer A-119
(25)
Doepfer A-119

Doepfer A-119 - external input/envelope follower; Width: 8HP / 40.3 mm; Depth: 45 mm (measured from the rear side of the front panel); Current: +30mA (+12V) / -20mA (-12V)

  • Module: Yes
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Doepfer A-199 Spring Reverb Module
(29)
Doepfer A-199 Spring Reverb Module

Doepfer A-199 Spring Reverb Module - electronically simulated by means of 3 spiral springs. Spring reverb systems have a very characteristic sound that is based on the (insufficient) mechanical...

  • Module: Yes
  • Empty Rack, Or Housing: No
  • Basic System: No
  • Accessories: No
€66 £57.23
Price includes VAT, shipping costs extra
£ price - guideline price only
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item number 383631
sales unit 1 piece
available since April 2016
Total rating
handling
features
sound
quality
sales rank
in this category Rank 99
at thomann.de Rank 17239
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Offers include 20% British VAT and are valid as long as stocks last. Shipping costs to the U.K. are 10 EUR (approx. £7), free shipping on orders above 199 EUR. Please click here for international Shipping rates. We do not accept liability for typographical errors or inaccurate information of any kind. *RRP = manufacturer's / distributor's recommended retail price in Germany
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